Abstract
The behavioural effects of both apomorphine (stereotypies) and haloperidol (catalepsy and reversal of stereotypies) were significantly enhanced in hypophysectomized rats compared with sham-operated rats. Both the efficacy and duration of action were increased Hypophysectomized animals had significantly greater brain haloperidol concentrations than did sham-operated animals. The data suggest that changes in brain drug concentrations following hypophysectomy at least partially explain the behavioural alterations seen in this test situation.
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